So I have a 75 gallon planted tank with Eco Complete as the substrate that is about 6 months old and doing well except that despite having an Eheim 2028 running full tilt the water remains cloudy with often visible particulates but other times just hazy. Cleaning the filter hasn't helped and I think the 2028 should if anything be overkill for a tank this size. The tank chemistry which I check regularly is fine and the fish and plants seem to be thriving. Any ideas? Thanks.